INTERNATIONAL MEETINGS

1. Bozkaya, U.; Turney, J. M.; Yamaguchi, Y.; Schaefer, H. F., “The Lowest-Lying Electronic Singlet and Triplet Potential Energy Surfaces for the HNO-NOH System: Energetics, Unimolecular Rate Constants, Tunneling and Kinetic Isotope Efects for the Isomerization and Dissociation Reactions”, 89 pp. Molecular Quantum Mechanics: From Methylene to DNA and Beyond (A Conference in Honor of Henry F. Schaefer III) Berkeley, CA (USA), May 2010.
2. Bozkaya, U., “Analytic Energy Gradients for Density-Fitted Coupled-Cluster Singles and Doubles”, EMN Meeting on Theory, İstanbul, Nov 2015 (Invited Talk).
3. Bozkaya, U., "Analytic Energy Gradients for Coupled-Cluster Methods with the Density-Fitting Approximation". EMN Meeting on Computation and Theory, Dubai, UAE, Nov 2017 (Invited Talk).
4. Bozkaya, U., "Efficient Implementations of Analytic Gradients and Related Molecular properties for High-Level Density-Fitted Coupled-Cluster Methods", 4th COST MOLIM General Meeting, Bologna, İtaly, Mar 2019 (Invited Talk).
5. Bozkaya, U., "Linear Scaling Coupled Cluster Methods with Molecular Fragmentation Approaches", Warsaw Molecular Electronic Structure virtual conference, Warsaw, Poland, Sep 2020 (Invited Talk). 
6. Bozkaya, U., "Linear Scaling Coupled-Cluster Methods", PsiCon2020, online, Dec 2020 (Invited Talk). 
7. Bozkaya, U., "Linear Scaling Coupled-Cluster Methods with Various Fragmentation Approaches", 25th International Workshop on Quantum Systems in Chemistry, Physics and Biology (QSCP 2022), Toruń, Poland, June 2022.
8. Bozkaya, T.,  Ünal, A., Bozkaya, U., "Assessment of the Density-Fitted Equation-of-Motion Coupled-Cluster Singles and Doubles Method for Excitation Energies", 25th International Workshop on Quantum Systems in Chemistry, Physics and Biology (QSCP 2022), Toruń, Poland, June 2022.
9. Bozkaya, U., "A Combined Cluster-in-Molecules and Systematic Molecular Fragmentation Approach for Electronic Structure Theories", Achievements and Challenges of Multiscale Modelling of Nanocrystals for Efficient Water Splitting (NANOWS 2022), University of Aveiro, Portugal, July 2022.
10. Bozkaya, U., "Linear-Scaling Systematic Molecular Fragmentation Molecular Fragmentation Approach for High-Level Coupled-Cluster Methods: Applications to Protein-Ligand Interactions", 8th International BAU-Drug Design Congress, Bahçeşehir University, Aralık 2022.
11. Bozkaya, U., "Molecular Fragmentation Approaches for Electron Correlation Methods", Designing the Future: Electro-, Photo-, and Thermochemical water splitting (COST 2023), Brussels, Belgium, Şubat 2023.
12. Bozkaya, U., "Linear-Scaling Systematic Molecular Fragmentation Approach", New Methods for the Description of Non-Covalent Interactions, COST Working Group Meeting, Online, May 2023 (Keynote Lecture).
13. Bozkaya, U., "Linear Scaling Coupled-Cluster Methods with Molecular Fragmentation Approaches", International Conference on Development of Nanocrystal Materials Through Computational Modelling, COST 18234, Haifa, İsrail, July 2023 (Invited Talk).

NATIONAL MEETINGS

1. Bozkaya, U.; Turney, J. M.; Yamaguchi, Y.; Schaefer, H. F.; Sherrill, C. D., “Quadratically-Convergent Orbital-Optimized Coupled-Cluster Doubles Method (QC-OD) and Orbital-Optimized Second-Order Møller-Plesset Perturbation Theory [QC-OM2]”, PPS12 pp., XV. National Chemistry Conference, Erzurum, Turkey, June 2011.
2. Önder, M.; Alp, N.; Akbayrak, S.; Biçer, A.; Gültekin, M. S.; Özkar, S.; Bozkaya, U. “Dihydroxylation of Olefins Catalyzed by Zeolite-Confined Osmium (0) Nanoclusters: An Efficient, Reusable and Eco-Friendly Method for the Preparation of 1,2-cis-Diols”, 2012.
3. Bozkaya, U., “Orbital-Optimized Second-Order Perturbation Theory with Density-Fitting and Cholesky Decomposition Approximations”, I. Computational Chemistry Conference, Van, Turkey, May 2014.
4. Bozkaya, U., “Analytic Energy Gradients for the Orbital-Optimized Second-Order Perturbation Theory with the Density-Fitting Approximation”, IV. Physical Chemistry Conference, Denizli, Turkey, June 2014.
5. Soydaş, E.; Bozkaya, U., “Applications of Density-Fitted Orbital-Optimized Perturbation Theory to Noncovalent Interactions”, I. Computational Chemistry Conference, Van, Turkey, May 2014.
6. Soydaş, E.; Bozkaya, U., “Structure and Energetics of Water Clusters with High-Level Ab Initio Methods”, IV. Physical Chemistry Conference, Denizli, Turkey, June 2014.
7. Bozkaya, U., “ Efficient Implementations of Post Hartree-Fock Methods with Density Fitting and Cholesky Decomposition Approximations”, Molecular Electronic Structure Workshop, Amasya, Turkey, September 2014.
8. Bozkaya, U., “Development and Efficient Implementations of Electron Correlation Methods with Density-Fitting and Cholesky Decomposition Approximations”, XIth Chemical Physics Congress, Istanbul, Turkey, October 2014.
9. Bozkaya, U., “Density-Fitted Coupled Cluster Methods”, V. Physical Chemistry Conference, Konya, Turkey, May 2015.
10. Bozkaya, U., “Analytic Gradients for The CCSD Method with Density-Fitting”, 2nd Computational Chemistry Conference, Kars, Turkey, June 2015. (Invited Speaker)
11. Bozkaya, U., “An Overview of Electronic Structure Methods”, 2nd Computational Chemistry Conference, Kars, Turkey, June 2015. (Invited Speaker)
12. Soydaş, E.; Bozkaya, U., “Applications of Orbital-Optimized MP2.5 to Thermochemistry and Kinetics”, 2nd Computational Chemistry Conference, Kars, Turkey, June 2015.
13. Yıldız, D.; Bozkaya, U., “Investigation of Cation-Pi Interactions with High-Level Ab Initio Methods”, 2nd Computational Chemistry Conference,  Kars, Turkey, June 2015.
14. Bozkaya, U., "Coupled-Cluster Yöntemlerinin Enerji ve Analitik Gradientlerinin Geliştirilmesi ve Etkin Programlanması", TUBA-GEBIP Annual Meeting, Kastamonu, October 2016 (Invited Talk).
15. Bozkaya, U., "Analytic Energy Gradients for Coupled-Cluster Methods with the Density- Fitting Approximations", Department of Chemistry, Bilkent University, Ankara, February 2017 (Invited Talk).
16. Bozkaya, U., "Yoğunluk Fit Edilmiş Coupled-Cluster Yöntemlerinin Analitik Gradiyentlerinin Geliştirilmesi ve Etkin Programlanması", 6th Physical Chemistry Congress, Zonguldak, May 2017.
17. Ünal, A.; Bozkaya, U., "Anyonik Su Kümelerinin Denge Geometrilerinin, Bağlanma ve Dikey Elektron Koparılma Enerjilerinin Kuantum Kimyasal Yöntemlerle Yüksek Doğrulukta Hesaplanması", 6th Physical Chemistry Congress, Zonguldak, May 2017.
18. Bozkaya, U., "Coupled-Cluster Yöntemlerinin Enerji ve Analitik Gradientlerinin Geliştirilmesi ve Etkin Programlanması", TUBA-GEBIP Annual Meeting, Erzurum, Turkey, September 2017 (Invited Talk).
19. Bozkaya, U., "Yoğunluk Fit Edilmiş Coupled-Cluster Yöntemlerinin Enerji ve Analitik Gradiyentlerinin Geliştirilmesi ve Etkin Programlanması", 3rd Computational Chemistry Congress, Ankara, Turkey, October 2017.
20. Aksakal, F., Bozkaya, U., "Fenantrilkarben İzomerlerinin Termal Düzenlenme Reaksiyon Mekanizmalarının Ab İnitio Yöntemlerle İncelenmesi", 3rd Computational Chemistry Congress, Ankara, Turkey, October 2017.
21. Demircan, Ç. A., Bozkaya, U., "Ağır Metal Katyonu-Pi Etkileşiminin Yüksek Düzeyli Kuantum Mekanik Yöntemlerle Araştırılması", 3rd Computational Chemistry Congress, Ankara, Turkey, October 2017.
22. Ünal, A.; Bozkaya, U., "Anyonik Su Kümelerinin Yapıları ve Enerjilerinin Kuantum Kimyasal Yöntemlerle Yüksek Doğrulukta Hesaplanması", 3rd Computational Chemistry Congress, Ankara, Turkey, October 2017.
23. Ektirici, S., Ramazanlı A., Bozkaya, U., "Biradikaloid Reaksiyon Mekanizmalarının Hesaplamalı Yöntemlerle İncelenmesi", 3rd Computational Chemistry Congress, Ankara, Turkey, October 2017.
24. Bozkaya, U., "Biradicals, Excited States and the Multireference Problem: Is It Possible to have a Straightforward Solution? ", 4th Organic Chemistry Congress, Antalya, October 2018.
25. Bozkaya, U., "An Efficient Analytic Gradients Suite for High-Level Density-Fitted Coupled-Cluster and Perturbation Theories: The DF-OCC Module", 12th Chemical Physics Congress, Safranbolu, October 2018 (Invited Talk).
26. Bozkaya, U.; Ünal, A., "State-of-the-Art Computations of Vertical Ionization Potentials with the Extended Koopmans" Theorem Integrated with the CCSD(T) Method", 12th Chemical Physics Congress, Safranbolu, October 2018. 
27. Bozkaya, U., "Linear-Scaling Systematic Molecular Fragmentation Approach for Perturbation Theory and Coupled-Cluster Methods", 13th Chemical Physics Congress, Elazığ, October 2022 (Invited Speaker).
28. Ünal, A.; Bozkaya, U., "Equation-of-Motion Orbital-Optimized Second-Order Perturbation Theory with The Density-Fitting Approximation", 13th Chemical Physics Congress, Elazığ, October 2022.

INVITED LECTURES

1. Bozkaya, U., "Quadratically Convergent Orbital-Optimized Coupled-Cluster Doubles Method (QC-OD) and Orbital-Optimized Second-Order Moller-Plesset Perturbation Theories (QC-OMP2)", Gazi University Department of Chemistry, Ankara, October 2010.
2. Bozkaya, U., "Thermal Rearrangements of 2-Alkilydenecyclopenta-1,3-diyl Biradicals", Atatürk University Department of Chemistry, Erzurum, May 2011.
3. Bozkaya, U., "Analytic Energy Gradients for Coupled-Cluster Methods with The Density-Fitting Approximation", Bilkent University Department of Chemistry, Ankara, February 2017.
4. Bozkaya, U., Gazi Üniversitesi Kimya Topluluğu Seminerleri, Gazi University Department of Chemistry, Ankara, May 2018.
5. Bozkaya, U., "Modern Approaches for High-Level Coupled-Cluster and Perturbation Theory Methods", Koç University Department of Chemistry, İstanbul, October 2018.